must speak
Irregular verb: speak - spoke- spoken, spoke

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must speak
you must speak
he must speak
we must speak
you must speak
they must speak 	I must be speaking
you must be speaking
he must be speaking
we must be speaking
you must be speaking
they must be speaking	I must have spoken, spoke
you must have spoken, spoke
he must have spoken, spoke
we must have spoken, spoke
you must have spoken, spoke
they must have spoken, spoke	I must have been speaking
you must have been speaking
he must have been speaking
we must have been speaking
you must have been speaking
they must have been speaking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not speak
you must not speak
he must not speak
we must not speak
you must not speak
they must not speak 	I must not be speaking
you must not be speaking
he must not be speaking
we must not be speaking
you must not be speaking
they must not be speaking	I must not have spoken, spoke
you must not have spoken, spoke
he must not have spoken, spoke
we must not have spoken, spoke
you must not have spoken, spoke
they must not have spoken, spoke	I must not have been speaking
you must not have been speaking
he must not have been speaking
we must not have been speaking
you must not have been speaking
they must not have been speaking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I speak?
must you speak?
must he speak?
must we speak?
must you speak?
must they speak? 	must I be speaking?
must you be speaking?
must he be speaking?
must we be speaking?
must you be speaking?
must they be speaking? 	must I have spoken, spoke?
must you have spoken, spoke?
must he have spoken, spoke?
must we have spoken, spoke?
must you have spoken, spoke?
must they have spoken, spoke? 	must I have been speaking?
must you have been speaking?
must he have been speaking?
must we have been speaking?
must you have been speaking?
must they have been speaking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not speak?
must you not speak?
must he not speak?
must we not speak?
must you not speak?
must they not speak? 	must I not be speaking?
must you not be speaking?
must he not be speaking?
must we not be speaking?
must you not be speaking?
must they not be speaking? 	must I not have spoken, spoke?
must you not have spoken, spoke?
must he not have spoken, spoke?
must we not have spoken, spoke?
must you not have spoken, spoke?
must they not have spoken, spoke? 	must I not have been speaking?
must you not have been speaking?
must he not have been speaking?
must we not have been speaking?
must you not have been speaking?
must they not have been speaking?